>>96382161
Gods are warp entities, great storms in the general turbulence of the immaterium that manage to keep some manner of coherency and identity. If they suffer enough damage or starvation they can start to dissolve, loosing awareness and consciousness, or break apart. But while Khaine, Mathlann and Grugni are in a really bad shape nowadays they're not completely gone, so they can still be fed (potentially restoring them in the future) and tapped into.